Exhaust spark arrester



Aug-31,1948 H. E. DAVIDSON 2,448,420

EXHAUST SPARK ARRESTER Filed May 6, 1944 2 Sheets-Sheet l.

12 5 4 g v I I Z Aug; 3 1948. H. E. DAVIDSON 2,448,420

C EXHAUST SPARK ARRESTER v Filed May 6, 1944 2 Sheets-Sheet 2 mulHillllll [270i 7 n zucnfofb Patented Aug. 31, 1948 EXHAUST SPARKARRESTER Harvey Ellis Davidson, Tulsa, Okla, assigiior to BethlehemSteel Company, a corporation" of Pennsylvania.

Application May 6, 1944, Serial No. 534,507

3 Claims. (01. 183-582) My invention relates to a device for attachmentto the exhaust outlet of an internal combustion engine, and moreparticularly to a device for separating dangerous sparks and hot carbonparticles from the exhaust gases of such an engine.

Much of the power used inoil fields, for example, is providedby internalcombustion engines. The exhaust gases from these engines usually containlarge and small pieces of carbon which are often incandescent. If thesecome into contact with inflammable materials or gases, a fire mayresult. Hence, it is requisite in the interest of safety to cool thegases and remove the carbon before the exhaust enters the open air, andit is desirable in general to minimize the engine exhaust noise.

One object of my invention, therefore, is to provide simple anddependable means of extracting carbon inclusions from exhaust gases.

Another object is to provide a safe device for cooling said gases.

A further object is to provide substantial means for muifling exhaustnoises.

Other objects, advantages and purposes of my invention will appearhereinafter in the specifi cation and in the appended claims, and inorder to describe the invention more clearly I shall now refer to theannexed two sheets of drawings forming a part of this specification andin which like figures of reference indicate like parts.

Figure 1 is a bottom plan view of my invention;

Fig. 2 is a side elevation of the invention;

Fig. 3 is a vertical section taken along the line 3-3 of Fig. 2; and

Fig. 4 is a vertical section along the line 4-4 of Fig. 2.

As shown in said drawings the device is constructed of metal sheets orplates which are shaped and welded together in understood manner, andcomprises a horizontally disposed tubular casing I, closed at the ends 2and separated by vertical walls 3 and 4 provided with round centralopenings 5 and 6 into three intercommunicating compartments 1, 8 and 9.The larger middle compartment 8 is provided with a tangential verticalinlet Ill directed upward toward a constricting baflie l I.Semi-circularly about the openings 5 and 6 and extending horizontallyfrom the casing l in ach of the smaller end compartments 1 and 9 are thescrollor J-shaped whirler plates [2 and I3, disposed substantially asshown to reverse the direction of gas flow. The peripheral dischargeopenings M and I5 of said end compartments 1 and 9 communicate with anexternal discharge chamber or exhaust box IE I extending lengthwise ofthe tubular casing I and provided with a horizontally disposed centraloutlet l1.

The bottom wall of the tubular casing! is provided with slot-likeopenings l8 l9 and extending lengthwise of the casing, portions of saidbottom wall being bent upwardly opposed to I exli austs into the two endcompartments 1 and 9 through the openings 5 and '6 in walls 3 and 4. Theheavier carbon particles fol-low the wall of the casing and drop intothe middle trough 24 when intercepted by the lip 22. In said endcompartments 1 and 9 the curved whirler plates I2 and I3 divert andreverse the circumferential flow of the gases, causing the remaininglighter particles of carbon, intercepted by lips 2| and 23, to drop insimilar manner into the end [troughs 24, from any of which troughs 24the accumulated carbon may be easily removed when desired by taking outthe pipe plugs 25, 26 or 21. Passing through discharge openings l4 andIS, the cleaned, cooled and quieted gases reunite in the exhaust box l6,from which through the outlet I 1 they finally emerge into theatmosphere.

Although I have hereinlabove shown and described my invention inconsiderable detail, I do not wish to be limited to the exact andspecific structure shown, but may use such substitutes, modifications orequivalents thereof as are within the scope and spirit of the inventionand of the appended claims.

My invention having been thus described, what I claim as new and usefuland desire to secure by Letters Patent is:

1. A spark arrester for exhaust gases, comprising a horizontal unitarycylindrical casing, a plurality of intercommunicating compartments insaid casing, Ia tangential inlet to admit exhaust gases to one of thecompartments and to impart a whirling motion to said gases therein,means for assisting the whirling gases to pass therefrom into adjoiningcompartments, means in said adjoining compartments for reversing thedirection of the moving gases, means for collecting canbon panti-clesbeneath the casing, an exhaust box for receiving the spent gases and atangential outlet for releasing said gases.

2. A spark arrester for exhaust gases, comprising a horizontallydisposed cylindrical casing, a pair of annular spaced partitions forminga middle compartment and two communicating en-d compartments therein, arestricted tangential orifice for admitting andcircumcf-erentiallydirecting the gases into the middle compartment, an upturned whirlerplate in each end compartment for reversing the direction of gas flowtherein, and a rear exhaust box for receiving the gases from the endcompartments and discharging them to atmosphere.

3. A spark arrester for exhaust gases, comprising a horizontalcylin-dricalcasing, la large central compartment in said casing, asmall-er compartment at each side of the large central compartment andcommunicating therewith, a

vertical tangential inlet to the central compartmemt to admit the gases,a constricting bafile plate above said inlet to accelerate and impart awhirling motion to the gases, a J-shaped whirler plate in each-endcompartment adapted to reverse the direction ofwhirling motion therein,a longitudinal slot in the bottom of each compartment, a raised lip ateach slot to intercept and direct downward canbon particles, a longi=tudinal trap beneath each slot for collecting said carbon particles, aplug for cleaning each trap, a discharge opening in each endcompartment, an exhaust box communicating with the discharge openingsand lengthwise of the cylindrical casing wherein the gases reunite, anda horizontally disposed cent-cal outlet for releasing the gases fromsaid exhaust box.

V HARVEY ELLIS DAVIDSON.

REFERENCES CITED Thefollowing references are of record in the fileofthis patent:

UNITED STATES PATENTS Number Name Date 452,580 Morse May 19, 1891535,099 Gale et a1 Mar. '5, 1895 696,604 Stebbins Apr. 1, 1902 "775,944Stebbins Nov. 29,1904 1,620,241 Steb=bins Mar. 8, 1927 1,787,079 LykkenDec. 30, 1930 FOREIGN PATENTS Number Country Date Great Britain 1885

